Unable to build under 12.1-p2 (python3.7)

[karpa13a]

root@host01:/var/tmp # uname -a
FreeBSD host01 12.1-RELEASE-p2 FreeBSD 12.1-RELEASE-p2 GENERIC  amd64
root@host01:/var/tmp # git clone https://github.com/bsdci/libioc
Cloning into 'libioc'...
remote: Enumerating objects: 11, done.
remote: Counting objects: 100% (11/11), done.
remote: Compressing objects: 100% (9/9), done.
remote: Total 12395 (delta 2), reused 4 (delta 2), pack-reused 12384
Receiving objects: 100% (12395/12395), 10.36 MiB | 1.24 MiB/s, done.
Resolving deltas: 100% (8746/8746), done.
root@host01:/var/tmp # cd libioc/
root@host01:/var/tmp/libioc # make
pkg install -q -y libucl py36-ucl py36-cython rsync python36 py36-libzfs
pkg: No packages available to install matching 'py36-ucl' have been found in the repositories
*** Error code 70

Stop.
make: stopped in /var/tmp/libioc
root@host01:/var/tmp/libioc # git status
On branch master
Your branch is up to date with 'origin/master'.

nothing to commit, working tree clean

root@host01:/var/tmp/libioc # git log -n 1
commit 1dcdd858ad8c5deda1ec26c5cc1bac90ae718913 (HEAD -> master, origin/master, origin/HEAD)
Author: Stefan Gr<C3><B6>nke <[email protected]>
Date:   Sat Nov 2 16:17:42 2019 +0000

    check Fstab automount destination directory
root@rbps05-md-host01:/var/tmp/libioc #